Salicylic ether of quinin.



UNITED STATES mma FRITZ HOFMANN, OF ELBERFELD, GERMANY, ASSIGNOR TO FARBEN- FABRIKEN' OF ELBERFELD 00., OF NEW YORK, N. Y.

VSALICYLIC ETHER OF QUININ.

$PECIFIGATION forming part of Letters Patent No. 678,401, dated July 16, 1901.

Application filed April 30, 1901. fierla-l No. 58,187. (Specimens) dooog n nao.

According to my researches this new compound can be easily obtained by heating the al phyl ethers of salicylic acid, generally termed salols, with quinin. On using,-for instance, phenyl salicylate the process proceeds accord ing to the following equation:

6 ooocm,

, iNtzo.oo n rno phenol and the new quinin salicylate being produced. The new quinin derivative thus obtained is tasteless and possesses a great therapeutic value. It is 'a valuable remedy against fever. The average dose employed for this purpose is about one-half gram.

' In carrying out my new process practically I can proceed as follows, the parts being by,

weight: In a vessel provided with a descending condenser a mixture prepared from three hundred and twenty-four parts of quinin (free from water) and two hundred and fourteen parts of salol (phenyl salicylate) is heated by means of an oil-bath in vacuo to a temperature'of from 170 to 190 centigrade. After the mixture has melted the distillation of pure phenol begins, which'solidifies in the receiver to a crystalline mass. After the reaction is is removed from the chloroform solution. Subsequently this solution is shaken with dilute sulfuric acid in order to transform the new quinin derivative contained therein into its sulfate. The resulting sulfuric-acid solution of the new body is then separated from the chloroform. In order to prepare the free quinin derivative, the sulfuric-acid solution is mixed with an excess of sodium carbonate, and from the resulting mixture the free base of quinin salicylate is isolated in the usual way by shaking the mixture with ether. From the resulting ethereal solution the new compound separates after some time in the shape of white needles. It is filtered off and dried. The new salicylic ether of quinin having most probably the above-given formula is a white crystalline powder melting at 138 centigrade. It is very readily soluble in chloroform, readily soluble in hot alcohol and in benzene, and soluble with difficulty in ether and in cold alcohol. Ferric chlorid (FeCl colors its alcoholic solution reddish brown.

Having now described my invention and in what manner the same is to be performed,what I claim as new, and desire to secure by Letters Patent, is-

The herein-described new salicylic ether of quinin having most probably the formula:

being a tasteless white crystalline powder melting at 138 centigrade,which is very readily soluble in chloroform, readily soluble in hot alcohol and in benzene and soluble with difficulty in ether and in cold alcohol, the alcoholic solution being colored reddish brown bya ferric-chlorid solution, substantially as hereinbefore described.

In testimony whereof I have signed my name in the presence of two subscribing wit- IIGSSGS- FRITZ HOFMANNJ 

